Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
CA 02988613 2017-12-07
FLOW ENTRY AGING METHOD, SWITCH, AND
CONTROLLER
TECHNICAL FIELD
Embodiments of the present invention relate to Internet technologies, and in
particular, to a flow entry aging method, a switch, and a controller.
BACKGROUND
Conventional network devices generally rely on special-purpose hardware to
obtain higher performance. However, a network becomes more complex because of
a
loss of commonality. In software-defined networking (Software Defined
Networking,
SDN for short), a controller may call an application programming interface
(Application Programming Interface, API for short) of an underlying hardware
device
for programming, so as to improve performance of a network device without a
need to
rely on special-purpose hardware.
In an SDN architecture, a controller (Controller) may configure multiple flow
tables for a switch by using the OpenFlow (Openflow) protocol, so as to
control
forwarding of a data packet. Each flow table includes multiple flow entries.
The
switch (Switch) may forward a data packet according to a flow entry delivered
by the
controller, so as to decouple control and forwarding of the data packet. The
controller
may control a flow entry in a flow table (Flow Table) on the switch, so as to
control a
forwarding action of the switch. Different flow entries are corresponding to
different
forwarding processing rules, and different flow entries are required for
processing
data packets with different service requirements. As the switch supports
increasingly
more service requirements, the switch uses increasingly more flow entries to
process
data packets. Therefore, to ensure normal matching of a flow entry in a flow
table on
the switch, each flow entry needs to have an aging condition corresponding to
the
flow entry. The controller may determine, according to a matching status that
is of
each flow entry and that is reported by the switch, whether the flow entry
meets the
aging condition. If the controller determines that the flow entry meets the
aging
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condition, the controller delivers an indication message to the switch, and
the switch
ages the flow entry, for example, deletes the flow entry.
That is, the controller needs to exchange signaling with the switch for
multiple
times, so as to age a flow entry. Because signaling exchange between the
controller
and the switch takes time, the switch cannot age the flow entry precisely, and
this
easily leads to wrong processing performed by the switch on a data packet.
SUMMARY
Embodiments of the present invention provide a flow entry aging method, a
switch, and a controller, to improve aging precision of a flow entry, and
reduce wrong
processing performed by the switch on a data packet.
According to a first aspect, an embodiment of the present invention provides a
flow entry aging method, including:
obtaining, by a switch, an aging threshold of a flow entry, where the aging
threshold includes a matching success threshold of the flow entry;
receiving, by the switch, a data packet;
matching, by the switch, the data packet and the flow entry, and counting a
matching success quantity;
determining, by the switch, whether the matching success quantity reaches the
matching success threshold, to obtain a determining result of the matching
success
threshold; and
aging, by the switch, the flow entry according to the determining result of
the
matching success threshold.
With reference to the first aspect, in a first implementable manner of the
first
aspect, the aging, by the switch, the flow entry according to the determining
result of
the matching success threshold includes:
aging, by the switch, the flow entry if the determining result of the matching
success threshold is that the matching success quantity reaches the matching
success
threshold.
With reference to the first implementable manner of the first aspect, in a
second
implementable manner, the aging threshold further includes: a time threshold
of the
flow entry, and a taking-effect manner of the matching success threshold and
the time
threshold, and the taking-effect manner is that the matching success threshold
first
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takes effect, and then the time threshold takes effect; and
the aging, by the switch, the flow entry if the determining result of the
matching
success threshold is that the matching success quantity reaches the matching
success
threshold includes:
if the determining result of the matching success threshold is that the
matching
success quantity reaches the matching success threshold, determining, by the
switch, a
time when the matching success quantity reaches the matching success threshold
as a
start time of an aging time of the flow entry;
determining, by the switch, whether the aging time reaches the time threshold;
and
aging, by the switch, the flow entry if the aging time reaches the time
threshold.
With reference to the second implementable manner of the first aspect, in a
third
implementable manner, after the aging, by the switch, the flow entry if the
aging time
reaches the time threshold, the method further includes:
sending, by the switch, an aging reason of the flow entry to a controller,
where
the aging reason includes: the aging time reaches the time threshold after the
matching success quantity reaches the matching success threshold.
With reference to the first aspect, in a fourth implementable manner of the
first
aspect, the aging threshold further includes: a time threshold of the flow
entry, the
matching success threshold of the flow entry, and a taking-effect manner of
the time
threshold and the matching success threshold, and the taking-effect manner is
that the
matching success threshold and the time threshold simultaneously take effect;
before the aging, by the switch, the flow entry according to the determining
result of the matching success threshold, the method further includes:
determining, by the switch, whether an aging time of the flow entry reaches
the
time threshold, to obtain a determining result of the time threshold, where a
start time
of the aging time is a time when the switch installs the flow entry; and
the aging, by the switch, the flow entry according to the determining result
of the
matching success threshold includes:
aging, by the switch, the flow entry according to the determining result of
the
matching success threshold and the determining result of the time threshold.
With reference to the fourth implementable manner of the first aspect, in a
fifth
implementable manner, the aging, by the switch, the flow entry according to
the
determining result of the matching success threshold and the determining
result of the
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time threshold includes:
aging, by the switch, the flow entry if the determining result of the matching
success threshold is that the matching success quantity reaches the matching
success
threshold, and the determining result of the time threshold is that the aging
time does
not reach the time threshold.
With reference to the fifth implementable manner of the first aspect, in a
sixth
implementable manner, after the aging, by the switch, the flow entry if the
determining result of the matching success threshold is that the matching
success
quantity reaches the matching success threshold, and the determining result of
the
time threshold is that the aging time does not reach the time threshold, the
method
further includes:
sending, by the switch, an aging reason of the flow entry to a controller,
where
the aging reason includes: the matching success quantity reaches the matching
success
threshold, but the aging time does not reach the time threshold.
With reference to the fourth implementable manner of the first aspect, in a
seventh implementable manner, the aging, by the switch, the flow entry
according to
the determining result of the matching success threshold and the determining
result of
the time threshold includes:
aging, by the switch, the flow entry if the determining result of the matching
success threshold is that the matching success quantity reaches the matching
success
threshold, and the determining result of the time threshold is that the aging
time
reaches the time threshold.
With reference to the seventh implementable manner of the first aspect, in an
eighth implementable manner, after the aging, by the switch, the flow entry if
the
determining result of the matching success threshold is that the matching
success
quantity reaches the matching success threshold, and the determining result of
the
time threshold is that the aging time reaches the time threshold, the method
further
includes:
sending, by the switch, an aging reason of the flow entry to a controller,
where
the aging reason includes: the matching success quantity reaches the matching
success
threshold, and the aging time reaches the time threshold.
With reference to the fourth implementable manner of the first aspect, in a
ninth
implementable manner, the aging, by the switch, the flow entry according to
the
determining result of the matching success threshold and the determining
result of the
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time threshold includes:
aging, by the switch, the flow entry if the determining result of the matching
success threshold is that the matching success quantity does not reach the
matching
success threshold, and the determining result of the time threshold is that
the aging
time reaches the time threshold.
With reference to the ninth implementable manner of the first aspect, in a
tenth
implementable manner, after the aging, by the switch, the flow entry if the
determining result of the matching success threshold is that the matching
success
quantity does not reach the matching success threshold, and the determining
result of
the time threshold is that the aging time reaches the time threshold, the
method further
includes:
sending, by the switch, an aging reason of the flow entry to a controller,
where
the aging reason includes: the matching success quantity does not reach the
matching
success threshold, but the aging time reaches the time threshold.
With reference to any one of the first aspect or the tenth implementable
manner
of the first aspect, in an eleventh implementable manner, the obtaining, by a
switch,
an aging threshold of a flow entry includes:
receiving, by the switch, the flow entry sent by the controller, where the
flow
entry includes the aging threshold.
With reference to a second aspect, an embodiment of the present invention
provides a flow entry aging method, including:
determining, by a controller, an aging threshold of a flow entry, where the
aging
threshold includes a matching success threshold of the flow entry; and
sending, by the controller, the aging threshold of the flow entry to a switch,
where the aging threshold of the flow entry is used to enable the switch to
age the
flow entry according to the matching success threshold.
With reference to the second aspect, in a first implementable manner of the
second aspect, the aging threshold further includes: a time threshold of the
flow entry,
and a taking-effect manner of the matching success threshold and the time
threshold,
and the taking-effect manner is that the matching success threshold and the
time
threshold simultaneously take effect; and
the method further includes:
receiving, by the controller, an aging reason that is of the flow entry and
that is
sent by the switch, where
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the aging reason includes: a matching success quantity reaches the matching
success threshold, but an aging time does not reach the time threshold; or a
matching
success quantity does not reach the matching success threshold, but an aging
time
reaches the time threshold; or a matching success quantity reaches the
matching
success threshold, and an aging time reaches the time threshold, where a start
time of
the aging time is a time when the switch installs the flow entry.
With reference to the second aspect, in a second implementable manner of the
second aspect, the aging threshold further includes: a time threshold of the
flow entry,
and a taking-effect manner of the matching success threshold and the time
threshold,
and the taking-effect manner is that the matching success threshold first
takes effect,
and then the time threshold takes effect; and
the method further includes:
receiving, by the controller, an aging reason that is of the flow entry and
that is
sent by the switch, where the aging reason includes: an aging time reaches the
time
threshold after a matching success quantity reaches the matching success
threshold.
With reference to a third aspect, an embodiment of the present invention
provides a switch, including:
an obtaining module, configured to obtain an aging threshold of a flow entry,
where the aging threshold includes a matching success threshold of the flow
entry;
a receiving module, configured to receive a data packet;
a matching module, configured to match the data packet and the flow entry;
a counting module, configured to count a matching success quantity;
a judging module, configured to determine whether the matching success
quantity reaches the matching success threshold, to obtain a determining
result of the
matching success threshold; and
an aging module, configured to age the flow entry according to the determining
result of the matching success threshold.
With reference to the third aspect, in a first implementable manner of the
third
aspect, the aging module is configured to age the flow entry if the
determining result
of the matching success threshold is that the matching success quantity
reaches the
matching success threshold.
With reference to the first implementable manner of the third aspect, in a
second
implementable manner, the aging threshold further includes: a time threshold
of the
flow entry, and a taking-effect manner of the matching success threshold and
the time
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threshold, and the taking-effect manner is that the matching success threshold
first
takes effect, and then the time threshold takes effect; and
the switch further includes:
a determining module, configured to: if the determining result of the matching
success threshold is that the matching success quantity reaches the matching
success
threshold, determine a time when the matching success quantity reaches the
matching
success threshold as a start time of an aging time of the flow entry, where
the judging module is further configured to determine whether the aging time
reaches the time threshold; and
the aging module is further configured to age the flow entry if the aging time
reaches the time threshold.
With reference to the second implementable manner of the third aspect, in a
third
implementable manner, the switch further includes:
a first sending module, configured to: after the aging module ages the flow
entry,
send an aging reason of the flow entry to a controller, where the aging reason
includes: the aging time reaches the time threshold after the matching success
quantity
reaches the matching success threshold.
With reference to the third aspect, in a fourth implementable manner of the
third
aspect, the aging threshold further includes: a time threshold of the flow
entry, the
matching success threshold of the flow entry, and a taking-effect manner of
the time
threshold and the matching success threshold, and the taking-effect manner is
that the
matching success threshold and the time threshold simultaneously take effect;
the judging module is further configured to: before the aging module ages the
flow entry according to the determining result of the matching success
threshold,
determine whether an aging time of the flow entry reaches the time threshold,
to
obtain a determining result of the time threshold, where a start time of the
aging time
is a time when the switch installs the flow entry; and
the aging module is further configured to age the flow entry according to the
determining result of the matching success threshold and the determining
result of the
time threshold.
With reference to the fourth implementable manner of the third aspect, in a
fifth
implementable manner, the aging module is further configured to age the flow
entry if
the determining result of the matching success threshold is that the matching
success
quantity reaches the matching success threshold, and the determining result of
the
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time threshold is that the aging time does not reach the time threshold.
With reference to the fifth implementable manner of the third aspect, in a
sixth
implementable manner, the switch further includes:
a second sending module, configured to: after the aging module ages the flow
entry if the determining result of the matching success threshold is that the
matching
success quantity reaches the matching success threshold, and the determining
result of
the time threshold is that the aging time does not reach the time threshold,
send an
aging reason of the flow entry to a controller, where the aging reason
includes: the
matching success quantity reaches the matching success threshold, but the
aging time
does not reach the time threshold.
With reference to the fourth implementable manner of the third aspect, in a
seventh implementable manner, the aging module is further configured to age
the flow
entry if the determining result of the matching success threshold is that the
matching
success quantity reaches the matching success threshold, and the determining
result of
the time threshold is that the aging time reaches the time threshold.
With reference to the seventh implementable manner of the third aspect, in an
eighth implementable manner, the switch further includes:
a third sending module, configured to: after the aging module ages the flow
entry
if the determining result of the matching success threshold is that the
matching
success quantity reaches the matching success threshold, and the determining
result of
the time threshold is that the aging time reaches the time threshold, send an
aging
reason of the flow entry to a controller, where the aging reason includes: the
matching
success quantity reaches the matching success threshold, and the aging time
reaches
the time threshold.
With reference to the fourth implementable manner of the third aspect, in a
ninth
implementable manner, the aging module is further configured to age the flow
entry if
the determining result of the matching success threshold is that the matching
success
quantity does not reach the matching success threshold, and the determining
result of
the time threshold is that the aging time reaches the time threshold.
With reference to the ninth implementable manner of the third aspect, in a
tenth
implementable manner, the switch further includes:
a fourth sending module, configured to: after the aging module ages the flow
entry if the determining result of the matching success threshold is that the
matching
success quantity does not reach the matching success threshold, and the
determining
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result of the time threshold is that the aging time reaches the time
threshold, send an
aging reason of the flow entry to a controller, where the aging reason
includes: the
matching success quantity does not reach the matching success threshold, but
the
aging time reaches the time threshold.
With reference to any one of the third aspect to the tenth implementable
manner
of the third aspect, in an eleventh implementable manner, the receiving module
is
further configured to receive the flow entry sent by the controller, where the
flow
entry includes the aging threshold.
With reference to a fourth aspect, an embodiment of the present invention
provides a controller, including:
a determining module, configured to determine an aging threshold of a flow
entry, where the aging threshold includes a matching success threshold of the
flow
entry; and
a sending module, configured to send the aging threshold of the flow entry to
a
switch, where the aging threshold of the flow entry is used to enable the
switch to age
the flow entry according to the matching success threshold.
With reference to the fourth aspect, in a first implementable manner of the
fourth
aspect, the aging threshold further includes: a time threshold of the flow
entry, and a
taking-effect manner of the matching success threshold and the time threshold,
and
the taking-effect manner is that the matching success threshold and the time
threshold
simultaneously take effect; and
the controller further includes:
a first receiving module, configured to receive an aging reason that is of the
flow
entry and that is sent by the switch, where the aging reason includes: a
matching
success quantity reaches the matching success threshold, but an aging time
does not
reach the time threshold; or a matching success quantity does not reach the
matching
success threshold, but an aging time reaches the time threshold; or a matching
success
quantity reaches the matching success threshold, and an aging time reaches the
time
threshold, where a start time of the aging time is a time when the switch
installs the
flow entry.
With reference to the fourth aspect, in a second implementable manner of the
fourth aspect, the aging threshold further includes: a time threshold of the
flow entry,
and a taking-effect manner of the matching success threshold and the time
threshold,
and the taking-effect manner is that the matching success threshold first
takes effect,
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and then the time threshold takes effect; and
the controller further includes:
a second receiving module, configured to receive an aging reason that is of
the
flow entry and that is sent by the switch, where the aging reason includes: an
aging
time reaches the time threshold after a matching success quantity reaches the
matching success threshold.
With reference to a fifth aspect, an embodiment of the present invention
provides
a switch, including a processor, a receiver, and a transmitter, where
the processor is configured to obtain an aging threshold of a flow entry,
where
the aging threshold includes a matching success threshold of the flow entry;
the receiver is configured to receive a data packet; and
the processor is further configured to: match the data packet and the flow
entry,
and count a matching success quantity; determine whether the matching success
quantity reaches the matching success threshold, to obtain a determining
result of the
matching success threshold; and age the flow entry according to the
determining
result of the matching success threshold.
With reference to the fifth aspect, in a first implementable manner of the
fifth
aspect, the processor is further configured to age the flow entry if the
determining
result of the matching success threshold is that the matching success quantity
reaches
the matching success threshold.
With reference to the first implementable manner of the fifth aspect, in a
second
implementable manner, the aging threshold further includes: a time threshold
of the
flow entry, and a taking-effect manner of the matching success threshold and
the time
threshold, and the taking-effect manner is that the matching success threshold
first
takes effect, and then the time threshold takes effect; and
the processor is further configured to: if the determining result of the
matching
success threshold is that the matching success quantity reaches the matching
success
threshold, determine a time when the matching success quantity reaches the
matching
success threshold as a start time of an aging time of the flow entry;
determine whether
the aging time reaches the time threshold; and age the flow entry if the aging
time
reaches the time threshold.
With reference to the second implementable manner of the fifth aspect, in a
third
implementable manner, the transmitter is configured to send an aging reason of
the
flow entry to a controller, where the aging reason includes: the aging time
reaches the
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time threshold after the matching success quantity reaches the matching
success
threshold.
With reference to the fifth aspect, in a fourth implementable manner of the
fifth
aspect, the aging threshold further includes: a time threshold of the flow
entry, the
matching success threshold of the flow entry, and a taking-effect manner of
the time
threshold and the matching success threshold, and the taking-effect manner is
that the
matching success threshold and the time threshold simultaneously take effect;
and
the processor is further configured to: before aging the flow entry according
to
the determining result of the matching success threshold, determine whether an
aging
time of the flow entry reaches the time threshold, to obtain a determining
result of the
time threshold, where a start time of the aging time is a time when the switch
installs
the flow entry; and age the flow entry according to the determining result of
the
matching success threshold and the determining result of the time threshold.
With reference to the fourth implementable manner of the fifth aspect, in a
fifth
implementable manner, the processor is further configured to age the flow
entry if the
determining result of the matching success threshold is that the matching
success
quantity reaches the matching success threshold, and the determining result of
the
time threshold is that the aging time does not reach the time threshold.
With reference to the fifth implementable manner of the fifth aspect, in a
sixth
implementable manner, the transmitter is further configured to send an aging
reason
of the flow entry to a controller, where the aging reason includes: the
matching
success quantity reaches the matching success threshold, but the aging time
does not
reach the time threshold.
With reference to the fourth implementable manner of the fifth aspect, in a
seventh implementable manner, the processor is further configured to age the
flow
entry if the determining result of the matching success threshold is that the
matching
success quantity reaches the matching success threshold, and the determining
result of
the time threshold is that the aging time reaches the time threshold.
With reference to the seventh implementable manner of the fifth aspect, in an
eighth implementable manner, the transmitter is further configured to send an
aging
reason of the flow entry to a controller, where the aging reason includes: the
matching
success quantity reaches the matching success threshold, and the aging time
reaches
the time threshold.
With reference to the fourth implementable manner of the fifth aspect, in a
ninth
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implementable manner, the processor is further configured to age the flow
entry if the
determining result of the matching success threshold is that the matching
success
quantity does not reach the matching success threshold, and the determining
result of
the time threshold is that the aging time reaches the time threshold.
With reference to the ninth implementable manner of the fifth aspect, in a
tenth
implementable manner, the transmitter is further configured to send an aging
reason
of the flow entry to a controller, where the aging reason includes: the
matching
success quantity does not reach the matching success threshold, but the aging
time
reaches the time threshold.
With reference to any one of the fifth aspect to the tenth implementable
manner
of the fifth aspect, in an eleventh implementable manner, the receiver is
further
configured to receive the flow entry sent by the controller, where the flow
entry
includes the aging threshold.
With reference to a sixth aspect, an embodiment of the present invention
provides a controller, including a processor, a receiver, and a transmitter,
where
the processor is configured to determine an aging threshold of a flow entry,
where the aging threshold includes a matching success threshold of the flow
entry;
and
the transmitter is configured to send the aging threshold of the flow entry to
a
switch, where the aging threshold of the flow entry is used to enable the
switch to age
the flow entry according to the matching success threshold.
With reference to the sixth aspect, in a first implementable manner of the
sixth
aspect, the aging threshold further includes: a time threshold of the flow
entry, and a
taking-effect manner of the matching success threshold and the time threshold,
and
the taking-effect manner is that the matching success threshold and the time
threshold
simultaneously take effect; and
the receiver is configured to receive an aging reason that is of the flow
entry and
that is sent by the switch, where the aging reason includes: a matching
success
quantity reaches the matching success threshold, but an aging time does not
reach the
time threshold; or a matching success quantity does not reach the matching
success
threshold, but an aging time reaches the time threshold; or a matching success
quantity reaches the matching success threshold, and an aging time reaches the
time
threshold, where a start time of the aging time is a time when the switch
installs the
flow entry.
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With reference to the sixth aspect, in a second implementable manner of the
sixth
aspect, the aging threshold further includes: a time threshold of the flow
entry, and a
taking-effect manner of the matching success threshold and the time threshold,
and
the taking-effect manner is that the matching success threshold first takes
effect, and
then the time threshold takes effect; and
the receiver is further configured to receive an aging reason that is of the
flow
entry and that is sent by the switch, where the aging reason includes: an
aging time
reaches the time threshold after a matching success quantity reaches the
matching
success threshold.
With reference to the flow entry aging method, the switch, and the controller
in
the embodiments of the present invention, the switch may determine whether the
matching success quantity of matching the flow entry and the data packet
reaches the
matching success threshold, so as to determine whether the flow entry meets
the aging
condition. If the matching success quantity reaches the matching success
threshold,
the flow entry meets the aging condition, and the switch ages the flow entry.
The
switch not only determines aging of the flow entry, but also ages the flow
entry.
Therefore, interaction between the switch and the controller can be reduced,
aging
precision of the flow entry can be improved, and wrong processing performed by
the
switch on the data packet can be reduced.
BRIEF DESCRIPTION OF DRAWINGS
To describe the technical solutions in the embodiments of the present
invention
or in the prior art more clearly, the following briefly describes the
accompanying
drawings required for describing the embodiments or the prior art. Apparently,
the
accompanying drawings in the following description show some embodiments of
the
present invention, and persons of ordinary skill in the art may still derive
other
drawings from these accompanying drawings without creative efforts.
FIG. 1 is a schematic diagram of a system architecture of an SDN network used
in the embodiments of the present invention;
FIG. 2 is a schematic diagram of a procedure in which a switch processes a
data
packet according to an embodiment of the present invention;
FIG 3 is a schematic diagram of parameters of a flow entry according to an
embodiment of the present invention;
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FIG 4 is a flowchart of a flow entry aging method according to Embodiment 1 of
the present invention;
FIG 5 is a flowchart of a flow entry aging method according to Embodiment 2 of
the present invention;
FIG. 6 is a flowchart of a flow entry aging method according to Embodiment 3
of
the present invention;
FIG 7 is a schematic diagram of parameters of a flow entry according to
Embodiment 3 of the present invention;
FIG 8 is a schematic diagram of parameters of another flow entry according to
Embodiment 3 of the present invention;
FIG. 9 is a flowchart of a flow entry aging method according to Embodiment 4
of
the present invention;
FIG 10 is a signaling flowchart of a flow entry aging method according to
Embodiment 5 of the present invention;
FIG 11A and FIG. 11B are a signaling flowchart of another flow entry aging
method according to Embodiment 5 of the present invention;
FIG. 12A and FIG. 12B are a signaling flowchart of still another flow entry
aging
method according to Embodiment 5 of the present invention;
FIG 13 is a schematic structural diagram of a switch according to Embodiment 6
of the present invention;
FIG 14 is a schematic structural diagram of a controller according to
Embodiment 7 of the present invention;
FIG. 15 is a schematic structural diagram of a switch according to Embodiment
8
of the present invention; and
FIG 16 is a schematic structural diagram of a controller according to
Embodiment 9 of the present invention.
DESCRIPTION OF EMBODIMENTS
To make the objectives, technical solutions, and advantages of the embodiments
of the present invention clearer, the following clearly and completely
describes the
technical solutions in the embodiments of the present invention with reference
to the
accompanying drawings in the embodiments of the present invention. Apparently,
the
described embodiments are some but not all of the embodiments of the present
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invention. All other embodiments obtained by persons of ordinary skill in the
art
based on the embodiments of the present invention without creative efforts
shall fall
within the protection scope of the present invention.
Solutions of the embodiments of the present invention are applicable to a
scenario of flow entry aging between a controller and a switch in an SDN
network
architecture that is based on the OpenFlow protocol. FIG. 1 is a schematic
diagram of
a system architecture of an SDN network used in the embodiments of the present
invention. As shown in FIG. 1, the SDN network 100 may include a controller
101
and a switch 102. The controller 101 and the switch 102 may interact by using
a
protocol packet, and the protocol packet may be an OpenFlow protocol packet.
The
switch 102 may be an OpenFlow switch. The switch 102 stores multiple flow
tables
103 and a group table (Group Table) 104. The switch 102 processes a received
data
packet according to at least one flow table in the multiple flow tables 103.
Each flow
table in the multiple flow tables 103 stores multiple flow entries that are
received by
the switch 102 and that are sent by the controller 101 by using the OpenFlow
protocol. The switch 102 further has a protocol channel 105, and the protocol
channel
105 may be an OpenFlow protocol channel. The switch 102 may receive, by using
the
protocol channel 105, a protocol packet sent by the controller 101, or send a
protocol
packet to the controller 101 by using the protocol channel 105.
For example, a switch is configured with n+1 flow tables that are a flow table
0
to a flow table n. FIG 2 is a schematic diagram of a procedure in which a
switch
processes a data packet according to an embodiment of the present invention.
As
shown in FIG. 2, the switch may sequentially process each data packet in data
packets
according to at least one flow table that includes the flow table 0. The
switch
determines an operation that matches a flow entry in each flow table,
determines a
corresponding operation instruction in an execution instruction set (Execute
Action
Set) according to the operation that matches the flow entry in each flow
table,
processes the data packet according to the corresponding operation instruction
in the
execution instruction set, and outputs the data packet, thereby implementing
forwarding of the data packet.
Each flow table may include multiple flow entries, and each flow entry
includes
multiple parameters. FIG 3 is a schematic diagram of parameters of a flow
entry
according to an embodiment of the present invention. As shown in FIG 3, each
flow
entry may include: a match field (Match Fields), a priority (Priority), a
counter
CA 02988613 2017-12-07
(Counters), an operation (Instructions), a timeout (Timeouts), and a cookie
(Cookie).
The match field may be an identifier of the flow entry. The priority may be a
matching priority of the flow entry. The counter is used to count statistical
data of the
flow entry. The operation is an operation that needs to be performed when the
flow
entry is successfully matched. The timeout includes an installation timeout
(hard_timeouts) and an idle timeout (idle_timeouts). The installation timeout
refers to
a time from installing the flow entry to aging the flow entry. The idle
timeout refers to
a time from a moment of last successful matching performed by a switch on the
flow
entry to a moment of aging the flow entry. The cookie may be an opaque value
selected by a controller, and is used to enable the controller to perform an
operation
on the switch, for example, count data of the flow entry, or change or delete
the flow
entry.
For each flow table, the switch may sequentially perform matching of each flow
entry according to priorities of multiple flow entries of each flow table.
When
performing matching of a flow entry, the switch may perform matching of the
flow
entry according to each parameter in a match field of the flow entry and a
received
data packet. If the flow entry is successfully matched, the switch may
determine,
according to an operation (Instructions) of the successfully matched flow
entry, an
operation that needs to be performed when the flow entry is successfully
matched, for
example, modifying metadata (Metadata) or operating an action (Action) list.
FIG 4 is a flowchart of a flow entry aging method according to Embodiment 1 of
the present invention. As shown in FIG 4, the method may include the following
steps.
S401. A switch obtains an aging threshold of a flow entry, where the aging
threshold includes a matching success threshold of the flow entry.
The aging threshold (Aging Threshold) may be an aging threshold that is
preconfigured on the switch side, or may be an aging threshold that is
received by the
switch and that is sent by another device such as a controller. The aging
threshold may
be represented by using a preset value of an original parameter of the flow
entry, or
may be represented by using a value of a parameter obtained by expanding an
original
parameter such as a timeout of the flow entry. A specific value of the
matching
success threshold may be determined, for example, according to an application
requirement corresponding to a service data packet processed by the switch.
S402. The switch receives a data packet.
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S403. The switch matches the data packet and the flow entry, and counts a
matching success quantity.
The switch may match the data packet and the flow entry. If the switch
successfully matches the data packet and the flow entry, the switch counts the
matching success quantity. The switch may perform matching, for example,
according
to a parameter in a match field of the flow entry and a corresponding
parameter in the
received data packet, thereby performing matching on the flow entry. The
parameter
in the match field of the flow entry may include, for example, a source
address and a
destination address. If the switch determines that both the source address and
the
destination address are the same as a source address and a destination address
that are
corresponding to the data packet, the switch may determine that the flow entry
and the
data packet are successfully matched. If the switch performs successful
matching on
the flow entry according to the data packet, the switch further needs to count
the
matching success quantity.
S404. The switch determines whether the matching success quantity reaches the
matching success threshold, to obtain a determining result of the matching
success
threshold.
The switch may compare the matching success quantity of the flow entry with
the matching success threshold, so as to determine whether the matching
success
quantity reaches the matching success threshold. If the matching success
quantity is
equal to the matching success threshold, the determining result of the
matching
success threshold is that the matching success quantity reaches the matching
success
threshold. Correspondingly, if the matching success quantity is less than the
matching
success threshold, the determining result of the matching success threshold is
that the
matching success quantity does not reach the matching success threshold.
S405. The switch ages the flow entry according to the determining result of
the
matching success threshold.
The switch may determine, according to different determining results of the
matching success threshold by separately using different manners, whether the
flow
entry meets an aging condition. If the flow entry meets the aging condition,
the switch
may age the flow entry, for example, delete the flow entry.
According to the flow entry aging method provided in this embodiment of the
present invention, the switch may determine whether the matching success
quantity of
matching the flow entry and the data packet reaches the matching success
threshold,
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obtain the determining result of the matching success threshold, determine,
according
to the determining result of the matching success threshold, whether the flow
entry
meets the aging condition, and if the flow entry meets the aging condition,
age the
flow entry. The switch not only determines aging of the flow entry, but also
ages the
flow entry. Therefore, interaction between the switch and the controller can
be
reduced, and aging precision of the flow entry can be improved, thereby
reducing
wrong processing performed by the switch on the data packet.
Embodiment 2 of the present invention further provides a flow entry aging
method. Optionally, in the method, based on Embodiment 1, that the switch ages
the
flow entry according to the determining result of the matching success
threshold in
S405 may include:
The switch ages the flow entry if the determining result of the matching
success
threshold is that the matching success quantity reaches the matching success
threshold.
For example, the flow entry aging method in Embodiment 2 of the present
invention may be applied to a scenario of charging based on service duration.
In the
scenario of charging based on service duration, a flow entry of a time
recording
operation is matched only when a data packet of a service is first received.
The time
recording operation does not need to be performed on a subsequently received
data
packet. That is, the flow entry of the time recording operation can be matched
only
once. Therefore, in this scenario, the matching success threshold may be set
to 1.
Provided that the switch performs successful matching on the flow entry
according to
the data packet, that is, the matching success quantity is 1, the flow entry
may be
aged, so that aging of the flow entry can be more precise.
Optionally, the aging threshold may further include: a time threshold of the
flow
entry, and a taking-effect manner of the matching success threshold and the
time
threshold. The taking-effect manner may be that the matching success threshold
first
takes effect, and then the time threshold takes effect.
A specific value of the time threshold may be determined by the controller
according to an application requirement corresponding to a service data packet
processed by the switch. If the aging threshold of the flow entry includes
multiple
thresholds, for example, the matching success threshold and the time
threshold, the
aging threshold may further include a taking-effect manner (Effection mode) of
the
matching success threshold and the time threshold. The taking-effect manner of
the
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matching success threshold and the time threshold may be an aging priority of
the
matching success threshold and the time threshold. For example, if the
matching
success threshold and the time threshold sequentially take effect, determining
may be
sequentially performed according to a sequence of the matching success
threshold and
the time threshold. When both the matching success threshold and the time
threshold
meet a requirement, the flow entry can be aged.
FIG 5 is a flowchart of the flow entry aging method according to Embodiment 2
of the present invention. As shown in FIG. 5, in the foregoing step in the
method, that
the switch ages the flow entry if the determining result of the matching
success
threshold is that the matching success quantity reaches the matching success
threshold
may include:
S501. If the determining result of the matching success threshold is that the
matching success quantity reaches the matching success threshold, the switch
determines a time when the matching success quantity reaches the matching
success
threshold as a start time of an aging time of the flow entry.
S502. The switch determines whether the aging time reaches a time threshold.
S503. The switch ages the flow entry if the aging time reaches the time
threshold.
That is, in the flow entry aging method in Embodiment 2 of the present
invention, the matching success threshold may be added, and the time threshold
may
be retained as the aging condition of the flow entry. That is, the aging
condition of the
flow entry may include the matching success threshold and the time threshold.
If the
taking-effect manner is taking effect sequentially, that is, the matching
success
threshold first takes effect, and then the time threshold takes effect, the
matching
success threshold and the time threshold sequentially meet the requirement.
That is, if
the aging time reaches the aging threshold after the matching success quantity
reaches
the matching success threshold, the switch may age the flow entry.
Optionally, after S503 in which the switch ages the flow entry if the aging
time
reaches the time threshold, the method may further include:
S504. The switch sends an aging reason of the flow entry to a controller,
where
the aging reason includes: the aging time reaches the time threshold after the
matching success quantity reaches the matching success threshold.
When the aging threshold includes multiple thresholds, the switch further
needs
to notify the controller of an actual aging reason of the flow entry after
aging the flow
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entry.
According to the flow entry aging method provided in Embodiment 2 of the
present invention based on Embodiment 1, the aging threshold may include the
matching success threshold and the time threshold, and the taking-effect
manner of
the matching success threshold and the time threshold is that the matching
success
threshold first takes effect, and then the time threshold takes effect.
Therefore, after
determining that the matching success quantity reaches the matching success
threshold, the switch may age the flow entry only after determining that the
aging
time reaches the time threshold, so that the switch can age the flow entry
more
precisely.
Embodiment 3 of the present invention provides a flow entry aging method. The
method is based on the method in Embodiment 1. Alternatively, the aging
threshold
further includes: a time threshold of the flow entry, the matching success
threshold of
the flow entry, and a taking-effect manner of the time threshold and the
matching
success threshold, and the taking-effect manner is that the matching success
threshold
and the time threshold simultaneously take effect. FIG 6 is a flowchart of the
flow
entry aging method according to Embodiment 3 of the present invention. As
shown in
FIG. 6, before S405 in which the switch ages the flow entry according to the
determining result of the matching success threshold in Embodiment 1, the
method
may further include:
S601. The switch determines whether an aging time of the flow entry reaches a
time threshold, to obtain a determining result of the time threshold, where a
start time
of the aging time is a time when the switch installs the flow entry.
Correspondingly, that the switch ages the flow entry according to the
determining result of the matching success threshold in S405 may include:
S602. The switch ages the flow entry according to the determining result of
the
matching success threshold and the determining result of the time threshold.
Optionally, that the switch ages the flow entry according to the determining
result of the matching success threshold and the determining result of the
time
threshold in S602 may include:
The switch ages the flow entry if the determining result of the matching
success
threshold is that the matching success quantity reaches the matching success
threshold, and the determining result of the time threshold is that the aging
time does
not reach the time threshold.
CA 02988613 2017-12-07
Correspondingly, after the switch ages the flow entry if the determining
result of
the matching success threshold is that the matching success quantity reaches
the
matching success threshold, and the determining result of the time threshold
is that the
aging time does not reach the time threshold, the method may include:
The switch sends an aging reason of the flow entry to the controller, where
the
aging reason includes: the matching success quantity reaches the matching
success
threshold, but the aging time does not reach the time threshold.
Alternatively, that the switch ages the flow entry according to the
determining
result of the matching success threshold and the determining result of the
time
threshold in S602 may include:
The switch ages the flow entry if the determining result of the matching
success
threshold is that the matching success quantity reaches the matching success
threshold, and the determining result of the time threshold is that the aging
time
reaches the time threshold.
Correspondingly, after the switch ages the flow entry if the determining
result of
the matching success threshold is that the matching success quantity reaches
the
matching success threshold, and the determining result of the time threshold
is that the
aging time reaches the time threshold, the method may include:
The switch sends an aging reason of the flow entry to the controller, where
the
aging reason includes: the aging time reaches the time threshold, and the
aging time
reaches the time threshold.
Alternatively, that the switch ages the flow entry according to the
determining
result of the matching success threshold and the determining result of the
time
threshold in S602 may include:
The switch ages the flow entry if the determining result of the matching
success
threshold is that the matching success quantity does not reach the matching
success
threshold, and the determining result of the time threshold is that the aging
time
reaches the time threshold.
Optionally, after the switch ages the flow entry if the determining result of
the
matching success threshold is that the matching success quantity does not
reach the
matching success threshold, and the determining result of the time threshold
is that the
aging time reaches the time threshold, the method may further include:
The switch sends an aging reason of the flow entry to the controller, where
the
aging reason includes: the matching success quantity does not reach the
matching
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success threshold, but the aging time reaches the time threshold.
Optionally, that a switch obtains an aging threshold of a flow entry in S401
in
Embodiment 1 may include:
The switch receives the flow entry sent by the controller, where the flow
entry
includes the aging threshold.
That is, the aging threshold may be sent by the controller by sending the flow
entry.
It should be noted that the flow entry may further include an aging type
(Aging
Type). FIG 7 is a schematic diagram of parameters of a flow entry according to
Embodiment 3 of the present invention. As shown in FIG 7, the flow entry may
include: a match field, a priority, a counter, an operation, an aging
threshold, and a
cookie. The aging threshold may include an aging type 1 and a value 1 (Value
1). The
aging type 1 (Aging Type 1) may be a type corresponding to the matching
success
threshold, for example, a count (count). The value 1 may be a matching success
quantity corresponding to the matching success threshold.
The aging threshold of the flow entry may further include the time threshold.
If
the aging threshold includes the time threshold, the flow entry may further
include an
aging type corresponding to the time threshold. The aging type corresponding
to the
time threshold may be a time (Time). FIG 8 is a schematic diagram of
parameters of
another flow entry according to Embodiment 3 of the present invention. As
shown in
FIG 8, the flow entry may include: a match field, a priority, a counter, an
operation,
an aging threshold, and a cookie. The aging threshold may include an aging
type 1
and a value 1. The aging type 1 may be a type corresponding to the matching
success
threshold, for example, a count. The value 1 may be a matching success
quantity
corresponding to the matching success threshold. The aging threshold may
further
include an aging type 2 and a value 2. The aging type 2 may be a type
corresponding
to the time threshold, for example, a time. The value 2 is a time
corresponding to the
time threshold. If the aging threshold of the flow entry includes multiple
thresholds,
for example, the matching success threshold and the time threshold, the aging
threshold may further include a taking-effect manner (Effection mode) of the
matching success threshold and the time threshold. The taking-effect manner of
the
matching success threshold and the time threshold may be an aging priority of
the
matching success threshold and the time threshold.
According to the flow entry aging method provided in Embodiment 3 of the
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CA 02988613 2017-12-07
present invention, the switch not only determines aging of the flow entry, but
also
ages the flow entry. Therefore, a time occupied by interaction between the
switch and
the controller can be reduced, and aging precision of the flow entry can be
improved,
thereby reducing wrong processing performed by the switch on the data packet.
In
addition, the aging threshold may include the matching success threshold and
the time
threshold, and the taking-effect manner of the matching success threshold and
the
time threshold is that the matching success threshold and the time threshold
simultaneously take effect. Therefore, the switch may age the flow entry when
determining that the matching success quantity reaches the matching success
threshold, or the aging time reaches the time threshold, so that the switch
can age the
flow entry more precisely and more flexibly.
Embodiment 4 of the present invention further provides a flow entry aging
method. The flow entry aging method in Embodiment 4 may be performed by a
controller. FIG 9 is a flowchart of the flow entry aging method according to
Embodiment 4 of the present invention. As shown in FIG. 9, the method may
include
the following steps.
S901. The controller determines an aging threshold of a flow entry, where the
aging threshold includes a matching success threshold of the flow entry.
The controller may determine the aging threshold of the flow entry according
to
a service requirement corresponding to a service executed by a switch.
S902. The controller sends the aging threshold of the flow entry to a switch,
where the aging threshold of the flow entry is used to enable the switch to
age the
flow entry according to the matching success threshold.
Optionally, the aging threshold may further include: a time threshold of the
flow
entry, and a taking-effect manner of the matching success threshold and the
time
threshold. Optionally, the taking-effect manner is that the matching success
threshold
and the time threshold simultaneously take effect.
Optionally, the method further includes:
The controller receives an aging reason that is of the flow entry and that is
sent
by the switch, where the aging reason includes: a matching success quantity
reaches
the matching success threshold, but an aging time does not reach the time
threshold;
or a matching success quantity does not reach the matching success threshold,
but an
aging time reaches the time threshold; or a matching success quantity reaches
the
matching success threshold, and an aging time reaches the time threshold,
where a
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start time of the aging time is a time when the switch installs the flow
entry.
Optionally, the aging threshold further includes: a time threshold of the flow
entry, and a taking-effect manner of the matching success threshold and the
time
threshold, and the taking-effect manner is that the matching success threshold
first
takes effect, and then the time threshold takes effect. The method further
includes:
The controller receives an aging reason that is of the flow entry and that is
sent
by the switch, where the aging reason includes: an aging time reaches the time
threshold after a matching success quantity reaches the matching success
threshold.
The flow entry aging method provided in Embodiment 4 of the present invention
is a flow entry aging method performed by the controller, that is, a peer
device of the
flow entry aging method performed by the switch in Embodiment 1 to Embodiment
3.
Specific details and beneficial effects of the method are similar to those of
the
foregoing embodiments, and the details are not described herein.
Embodiment 5 of the present invention further provides a flow entry aging
method. The method may be performed by a controller and a switch through
interaction. FIG. 10 is a signaling flowchart of the flow entry aging method
according
to Embodiment 5 of the present invention. As shown in FIG 10, the method may
include the following steps:
S1001. The controller determines a matching success threshold of a flow entry.
S1002. The controller sends the flow entry to the switch, where the flow entry
includes the matching success threshold.
S1003. The switch receives a data packet.
S1004. The switch performs matching on the flow entry according to the data
packet, and counts a matching success quantity.
S1005. The switch determines whether the matching success quantity reaches the
matching success threshold.
S1006. The switch ages the flow entry if the matching success quantity reaches
the matching success threshold.
Embodiment 5 of the present invention further provides another flow entry
aging
method. FIG 11A and FIG 11B are a signaling flowchart of the another flow
entry
aging method according to Embodiment 5 of the present invention. As shown in
FIG
11A and FIG. 11B, the method may include the following steps:
S1101. A controller determines a matching success threshold of a flow entry
and
a time threshold of the flow entry.
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S1102. The controller sends the flow entry to a switch, where the flow entry
includes: the matching success threshold, the time threshold, and a taking-
effect
manner of the matching success threshold and the time threshold, and the
taking-effect manner is that the matching success threshold and the time
threshold
simultaneously take effect.
S1103. The switch receives a data packet.
S1104. The switch performs matching on the flow entry according to the data
packet, and counts a matching success quantity.
S1105. The switch determines whether the matching success quantity reaches the
matching success threshold.
S1106. The switch determines whether an aging time reaches the time threshold,
where a start time of the aging time is a time when the switch installs the
flowentry.
S1107a. The switch ages the flow entry if the matching success quantity
reaches
the matching success threshold, but the aging time does not reach the time
threshold.
S1108a. The switch sends a notification message to the controller, where the
notification message includes an aging reason of the flow entry, and the aging
reason
of the flow entry includes: the matching success quantity reaches the matching
success threshold, but the aging time does not reach the time threshold.
S11 07b. The switch ages the flow entry if the matching success quantity
reaches
the matching success threshold, and the aging time reaches the time threshold.
S1108b. The switch sends a notification message to the controller, where the
notification message includes an aging reason of the flow entry, and the aging
reason
of the flow entry includes: the matching success quantity reaches the matching
success threshold, and the aging time reaches the time threshold.
S1107c. The switch ages the flow entry if the matching success quantity does
not
reach the matching success threshold, but the aging time reaches the time
threshold.
S1108c. The switch sends a notification message to the controller, where the
notification message includes an aging reason of the flow entry, and the aging
reason
of the flow entry includes: the matching success quantity does not reach the
matching
success threshold, but the aging time reaches the time threshold.
Embodiment 5 of the present invention further provides still another flow
entry
aging method. FIG. 12A and FIG 12B are a signaling flowchart of the still
another
flow entry aging method according to Embodiment 5 of the present invention. As
shown in FIG. 12A and FIG 12B, the method may include the following steps:
CA 02988613 2017-12-07
S1201. A controller determines a matching success threshold of a flow entry
and
a time threshold of the flow entry.
S1202. The controller sends the flow entry to a switch, where the flow entry
includes: the matching success threshold, the time threshold, and a taking-
effect
manner of the matching success threshold and the time threshold, and the
taking-effect manner is that the matching success threshold first takes
effect, and then
the time threshold takes effect.
S1203. The switch receives a data packet.
S1204. The switch performs matching on the flow entry according to the data
packet, and counts a matching success quantity.
S1205. The switch determines whether the matching success quantity reaches the
matching success threshold.
S1206. If the matching success quantity reaches the matching success
threshold,
the switch determines a time when the matching success quantity reaches the
matching success threshold as a start time of an aging time.
S1207. The switch determines whether the aging time reaches the time
threshold.
S1208. The switch ages the flow entry if the aging time reaches the time
threshold.
S1209. The switch sends a notification message to the controller, where the
notification message includes an aging reason of the flow entry, and the aging
reason
of the flow entry includes: the aging time reaches the time threshold after
the
matching success quantity reaches the matching success threshold.
According to the multiple flow entry aging methods provided in Embodiment 5
of the present invention, implementation processes and beneficial effects of
the
methods are similar to those of the foregoing embodiments, and details are not
described herein.
Embodiment 6
Embodiment 6 of the present invention further provides a switch. FIG. 13 is a
schematic structural diagram of the switch according to Embodiment 6 of the
present
invention. As shown in FIG. 13, the switch 1300 may include: an obtaining
module
1301, a receiving module 1302, a matching module 1303, a judging module 1304,
and
an aging module 1305.
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The obtaining module 1301 is configured to obtain an aging threshold of a flow
entry, where the aging threshold includes a matching success threshold of the
flow
entry.
The receiving module 1302 is configured to receive a data packet.
The matching module 1303 is configured to: match the data packet and the flow
entry, and count a matching success quantity.
The judging module 1304 is configured to determine whether the matching
success quantity reaches the matching success threshold, to obtain a
determining
result of the matching success threshold.
The aging module 1305 is configured to age the flow entry according to the
determining result of the matching success threshold.
Optionally, the aging module 1305 is further configured to age the flow entry
if
the determining result of the matching success threshold is that the matching
success
quantity reaches the matching success threshold.
Optionally, the aging threshold further includes: a time threshold of the flow
entry, and a taking-effect manner of the matching success threshold and the
time
threshold, and the taking-effect manner is that the matching success threshold
first
takes effect, and then the time threshold takes effect.
The switch 1300 further includes:
I = determining module, configured to: if the determining result of the
matching
success threshold is that the matching success quantity reaches the matching
success
threshold, determine a time when the matching success quantity reaches the
matching
success threshold as a start time of an aging time of the flow entry.
The judging module 1304 is further configured to determine whether the aging
time reaches the time threshold.
The aging module 1305 is further configured to age the flow entry if the aging
time reaches the time threshold.
Optionally, the switch 1300 further includes:
a first sending module, configured to: after the aging module 1305 ages the
flow
entry, send an aging reason of the flow entry to a controller, where the aging
reason
includes: the aging time reaches the time threshold after the matching success
quantity
reaches the matching success threshold.
Optionally, the aging threshold further includes: a time threshold of the flow
entry, the matching success threshold of the flow entry, and a taking-effect
manner of
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the time threshold and the matching success threshold, and the taking-effect
manner is
that the matching success threshold and the time threshold simultaneously take
effect.
The judging module 1304 is further configured to: before the aging module 1305
ages the flow entry according to the determining result of the matching
success
threshold, determine whether an aging time of the flow entry reaches the time
threshold, to obtain a determining result of the time threshold, where a start
time of
the aging time is a time when the switch installs the flow entry.
The aging module 1305 is further configured to age the flow entry according to
the determining result of the matching success threshold and the determining
result of
the time threshold.
Alternatively, the aging module 1305 is further configured to age the flow
entry
if the determining result of the matching success threshold is that the
matching
success quantity reaches the matching success threshold, and the determining
result of
the time threshold is that the aging time does not reach the time threshold.
Optionally, the switch 1300 further includes:
a second sending module, configured to: after the aging module 1305 ages the
flow entry if the determining result of the matching success threshold is that
the
matching success quantity reaches the matching success threshold, and the
determining result of the time threshold is that the aging time does not reach
the time
threshold, send an aging reason of the flow entry to a controller, where the
aging
reason includes: the matching success quantity reaches the matching success
threshold, but the aging time does not reach the time threshold.
Alternatively, the aging module 1305 is further configured to age the flow
entry
if the determining result of the matching success threshold is that the
matching
success quantity reaches the matching success threshold, and the determining
result of
the time threshold is that the aging time reaches the time threshold.
Optionally, the switch 1300 further includes:
a third sending module, configured to: after the aging module 1305 ages the
flow
entry if the determining result of the matching success threshold is that the
matching
success quantity reaches the matching success threshold, and the determining
result of
the time threshold is that the aging time reaches the time threshold, send an
aging
reason of the flow entry to a controller, where the aging reason includes: the
matching
success quantity reaches the matching success threshold, and the aging time
reaches
the time threshold.
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Alternatively, the aging module 1305 is further configured to age the flow
entry
if the determining result of the matching success threshold is that the
matching
success quantity does not reach the matching success threshold, and the
determining
result of the time threshold is that the aging time reaches the time
threshold.
Optionally, the switch 1300 further includes:
a fourth sending module, configured to: after the aging module 1305 ages the
flow entry if the determining result of the matching success threshold is that
the
matching success quantity does not reach the matching success threshold, and
the
determining result of the time threshold is that the aging time reaches the
time
threshold, send an aging reason of the flow entry to a controller, where the
aging
reason includes: the matching success quantity does not reach the matching
success
threshold, but the aging time reaches the time threshold.
Optionally, the receiving module 1302 is further configured to receive the
flow
entry sent by the controller, where the flow entry includes the aging
threshold.
The switch provided in Embodiment 6 of the present invention may perform the
flow entry aging method described in any one of Embodiment 1 to Embodiment 3.
For a specific implementation process and technical effects of the switch,
refer to the
foregoing embodiments. Details are not described herein.
Embodiment 7
Embodiment 7 of the present invention further provides a controller. FIG. 14
is a
schematic structural diagram of the controller according to Embodiment 7 of
the
present invention. As shown in FIG. 14, the controller 1400 may include a
determining module 1401 and a sending module 1402.
The determining module 1401 is configured to determine an aging threshold of a
flow entry, where the aging threshold includes a matching success threshold of
the
flow entry.
The sending module 1402 is configured to send the aging threshold of the flow
entry to a switch, where the aging threshold of the flow entry is used to
enable the
switch to age the flow entry according to the matching success threshold.
Optionally, the aging threshold further includes: a time threshold of the flow
entry, and a taking-effect manner of the matching success threshold and the
time
threshold, and the taking-effect manner is that the matching success threshold
and the
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time threshold simultaneously take effect.
The controller 1400 further includes:
a first receiving module, configured to receive an aging reason that is of the
flow
entry and that is sent by the switch, where the aging reason includes: a
matching
success quantity reaches the matching success threshold, but an aging time
does not
reach the time threshold; or a matching success quantity does not reach the
matching
success threshold, but an aging time reaches the time threshold; or a matching
success
quantity reaches the matching success threshold, and an aging time reaches the
time
threshold, where a start time of the aging time is a time when the switch
installs the
flow entry.
Optionally, the aging threshold further includes: a time threshold of the flow
entry, and a taking-effect manner of the matching success threshold and the
time
threshold, and the taking-effect manner is that the matching success threshold
first
takes effect, and then the time threshold takes effect.
The controller 1400 further includes:
a second receiving module, configured to receive an aging reason that is of
the
flow entry and that is sent by the switch, where the aging reason includes: an
aging
time reaches the time threshold after a matching success quantity reaches the
matching success threshold.
The controller provided in Embodiment 7 of the present invention may perform
the flow entry aging method described in Embodiment 4. For a specific
implementation process and technical effects of the controller, refer to the
foregoing
embodiment. Details are not described herein.
Embodiment 8
Embodiment 8 of the present invention further provides a switch. FIG 15 is a
schematic structural diagram of the switch according to Embodiment 8 of the
present
invention. As shown in FIG. 15, the switch 1500 may include: a processor 1501,
a
receiver 1502, and a transmitter 1503.
The processor 1501 is configured to obtain an aging threshold of a flow entry,
where the aging threshold includes a matching success threshold of the flow
entry.
The receiver 1502 is configured to receive a data packet.
The processor 1501 is further configured to: match the data packet and the
flow
CA 02988613 2017-12-07
entry, and count a matching success quantity; determine whether the matching
success
quantity reaches the matching success threshold, to obtain a determining
result of the
matching success threshold; and age the flow entry according to the
determining
result of the matching success threshold.
Optionally, the processor 1501 is further configured to age the flow entry if
the
determining result of the matching success threshold is that the matching
success
quantity reaches the matching success threshold.
Optionally, the aging threshold further includes: a time threshold of the flow
entry, and a taking-effect manner of the matching success threshold and the
time
threshold, and the taking-effect manner is that the matching success threshold
first
takes effect, and then the time threshold takes effect.
The processor 1501 is further configured to: if the determining result of the
matching success threshold is that the matching success quantity reaches the
matching
success threshold, determine a time when the matching success quantity reaches
the
matching success threshold as a start time of an aging time of the flow entry;
determine whether the aging time reaches the time threshold; and age the flow
entry if
the aging time reaches the time threshold.
Optionally, the transmitter 1503 is configured to send an aging reason of the
flow
entry to a controller, where the aging reason includes: the aging time reaches
the time
threshold after the matching success quantity reaches the matching success
threshold.
Optionally, the aging threshold further includes: a time threshold of the flow
entry, the matching success threshold of the flow entry, and a taking-effect
manner of
the time threshold and the matching success threshold, and the taking-effect
manner is
that the matching success threshold and the time threshold simultaneously take
effect.
The processor 1501 is further configured to: before aging the flow entry
according to the determining result of the matching success threshold,
determine
whether an aging time of the flow entry reaches the time threshold, to obtain
a
determining result of the time threshold, where a start time of the aging time
is a time
when the switch installs the flow entry; and age the flow entry according to
the
determining result of the matching success threshold and the determining
result of the
time threshold.
The processor 1501 is further configured to age the flow entry if the
determining
result of the matching success threshold is that the matching success quantity
reaches
the matching success threshold, and the determining result of the time
threshold is that
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CA 02988613 2017-12-07
the aging time does not reach the time threshold.
Optionally, the transmitter 1503 is further configured to send an aging reason
of
the flow entry to a controller, where the aging reason includes: the matching
success
quantity reaches the matching success threshold, but the aging time does not
reach the
time threshold.
Alternatively, the processor 1501 is further configured to age the flow entry
if the
determining result of the matching success threshold is that the matching
success
quantity reaches the matching success threshold, and the determining result of
the
time threshold is that the aging time reaches the time threshold.
Optionally, the transmitter 1503 is further configured to send an aging reason
of
the flow entry to a controller, where the aging reason includes: the matching
success
quantity reaches the matching success threshold, and the aging time reaches
the time
threshold.
Alternatively, the processor 1501 is further configured to age the flow entry
if the
determining result of the matching success threshold is that the matching
success
quantity does not reach the matching success threshold, and the determining
result of
the time threshold is that the aging time reaches the time threshold.
Optionally, the transmitter 1503 is further configured to send an aging reason
of
the flow entry to a controller, where the aging reason includes: the matching
success
quantity does not reach the matching success threshold, but the aging time
reaches the
time threshold.
Optionally, the receiver 1502 is further configured to receive the flow entry
sent
by the controller, where the flow entry includes the aging threshold.
The switch provided in Embodiment 8 of the present invention may perform the
flow entry aging method described in any one of Embodiment 1 to Embodiment 3.
For a specific implementation process and technical effects of the switch,
refer to the
foregoing embodiments. Details are not described herein.
Embodiment 9
Embodiment 9 of the present invention further provides a controller. FIG. 16
is a
schematic structural diagram of the controller according to Embodiment 9 of
the
present invention. As shown in FIG. 16, the controller 1600 includes: a
processor
1601, a receiver 1602, and a transmitter 1603.
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CA 02988613 2017-12-07
The processor 1601 is configured to determine an aging threshold of a flow
entry, where the aging threshold includes a matching success threshold of the
flow
entry.
The transmitter 1603 is configured to send the aging threshold of the flow
entry
to a switch, where the aging threshold of the flow entry is used to enable the
switch to
age the flow entry according to the matching success threshold.
Optionally, the aging threshold further includes: a time threshold of the flow
entry, and a taking-effect manner of the matching success threshold and the
time
threshold, and the taking-effect manner is that the matching success threshold
and the
time threshold simultaneously take effect.
The receiver 1602 is configured to receive an aging reason that is of the flow
entry and that is sent by the switch, where the aging reason includes: a
matching
success quantity reaches the matching success threshold, but an aging time
does not
reach the time threshold; or a matching success quantity does not reach the
matching
success threshold, but an aging time reaches the time threshold; or a matching
success
quantity reaches the matching success threshold, and an aging time reaches the
time
threshold, where a start time of the aging time is a time when the switch
installs the
flow entry.
Alternatively, the aging threshold further includes: a time threshold of the
flow
entry, and a taking-effect manner of the matching success threshold and the
time
threshold, and the taking-effect manner is that the matching success threshold
first
takes effect, and then the time threshold takes effect.
The receiver 1602 is further configured to receive an aging reason that is of
the
flow entry and that is sent by the switch, where the aging reason includes: an
aging
time reaches the time threshold after a matching success quantity reaches the
matching success threshold.
The controller provided in Embodiment 9 of the present invention may perform
the flow entry aging method described in Embodiment 4. For a specific
implementation process and technical effects of the controller, refer to the
foregoing
embodiment. Details are not described herein.
Persons of ordinary skill in the art may understand that all or some of the
steps of
the method embodiments may be implemented by a program instructing relevant
hardware. The program may be stored in a computer readable storage medium.
When
the program runs, the steps of the method embodiments are performed. The
foregoing
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CA 02988613 2017-12-07
storage medium includes: any medium that can store program code, such as a
ROM, a
RAM, a magnetic disk, or an optical disc.
Finally, it should be noted that the foregoing embodiments are merely intended
for describing the technical solutions of the present invention, but not for
limiting the
present invention. Although the present invention is described in detail with
reference
to the foregoing embodiments, persons of ordinary skill in the art should
understand
that they may still make modifications to the technical solutions described in
the
foregoing embodiments or make equivalent replacements to some or all technical
features thereof, without departing from the scope of the technical solutions
of the
embodiments of the present invention.
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